Flush pull slider for slide fasteners



' Aug. 18, 1942.

F. ULRICH FLUSH PULL SLIDER FOR SLIDE FASTENERS Filed April 29, 1941FREDERICK ULRICH Fi INVENTOR ATTORNEYS Patented Aug. 18, 1942 FLUSH PULLSLIDER. FOR SLIDE FASTENERS Frederick Ulrich, Bayonne, N. J., assignorto onmar Products Corporation, Bayonne, N. J., a

corporation of New Jersey Application April 29, 1941, Serial No. 390,905

(or. 24-2o5') 11 Claims.

This invention relates to slide fasteners, and more particularly tosliders therefor. A conventional slider for a slide fastener has a pullor finger piece pivotally mounted on top of the slider.

this construction is objectionable.

ironing the same.

extending all around the slider.

ing cam or locking tooth.

foregoing difficulties and disadvantages.

ing features of my invention;

Fig. 2 is a side elevation of the slider;

plane of the line 3-3 of Fig. 1;

looking at the underside;

and pull;

Fig.7 is a. side elevation of the same The slider body is usually pro- 5vided with an upstanding lug or projection on slider is that the topwall i2 is smooth and fiat, which the pull is pivoted. For somepurposes, there being no'upwardly projecting lug for the When the fingerpiece or pull. Instead, the pull I8 is disfastener is used on a garmenthaving a cloth posed below and substantially flush with the top flapoverlying the same, the lug raises the cloth 10 of the slider. ,It ispivoted to the lower end of noticeably, and what is even worse, mars.and the slider, and so may be turned from the flat may even tearthrough the cloth .when the garposition shown at l8 in Fig. 2, to thetransverse ment is treatedv under heavy pressure, as when or broken-lineposition movement of the slider along the slide fas- In an effort toovercome this difficulty, it tener. The fastener may be conventional,and has been suggested to use a flush pull, said pull as shown in Fig.1, comprises tapes 2!] pro- This construcvided with cords or beads 22 attheir inner edges tion, however, introduces disadvantages of its onwhich the fastener elements 24 are clamped. own, because it widens theover-all width of the The lower end of the slider is only slightly widerslider; it makes it difficult to stitch the tapes of than the width ofthe engaged fastener elements, the slide fastener to the garment bylines of and the pull I8 is preferably no wider than the stitchinglocated as closely to the fastener elelower end of the slider, andtherefore is itself ments as is desired; and it becomes impossible onlyslightly wider than the interlocked fasto provide the pull with apractical form of locktener em as will b een at the b ttom 25 of Fig. l.The object of the present invention is to pro- To secure the pull to heSl de e ower e d vide a flush pull slider which will overcome the of thetop wall of the slider and the upper end of the pull are matingly cutaway and inter- To the accomplishment of the foregoing genfitted whenviewed in plan, the interfitted parts eral object, and such other morespecific obein pivo d h r on a transverse axisjects as will hereinafterappear, my invention Considering Figs. 1, 2 and 3 more specifically,consists in the slider elements and their relathe top wall ofthe slideris cut away at 26 and tion oneto the other, as hereinafter are more 28,thus leaving a downwardly projecting lug particularly described in thespecification and 30. The upper' end of the pull i8 is. notched soughtto be defined in the claims. The .specior cut away at 32 to fit aroundthe lug 30. The fication is accompanied by a drawing, in which: parts orarms are secured together by 8- D Fig. -1 shows a slider constructionembodv- 34. The ends of the pin. are exposed in Fig. 1

- in order to clarify the construction, but in practice, these ends may,of course, be terminated Fig. 3 is a section taken approximately in the40 flush with the edges of the p ll- One important advantage of thepresent con- Fig. 4 shows the lower end of a modified slider; struc'tionis the ease with which appropriate Fig. 5 shows the upper end of amodified pull, locking means may be provided.

spaced arms formed at the upper end of the pull Fig. 6 shows theassembly of modified slider may be coined or upset to form cams 36 whichare adapted to bear tightly against the fastener elements when the pullis in fiat position. It Fig. 8 is a modification using .a pin lock; andshould be noted that the center of pressure of Fig. 9 shows the underside of the pull usedin the cam is preferably offset from and ispreferably below the axis of pin 34, so that the device Referring to thedrawing, and more particuwill be self-locking once the pull has beenturned larly to Figs. 1, 2 and 3, the slider comprises a down. For thefastener to open, the slider must downwardly flanged top wall l2 and anupwardmove relatively downward, or the fastener elely flanged bottomwall ll joined together at a ments must move relatively upward, and anyneck portion I6. In the particular slider body attempted relativemovement of this kind tends here shown, the neck portions are indented,and are secured together by welding, but other conventional sliderconstructions may equally well be employed.

The characteristic feature of the present I8, preparatory to Thus, the

to swing the lower end of the pull downwardly (I. against the fastener.It may also be mentioned that the locking action is improved ortightened because one of the cams will bear directly on a fastenerelement when the other moves between elements, this being due to thestaggered relation of the elements. Finally, it

may be observed that the cams 36 shown in Figs. 1, 2 and 3 areparticularly blunt, so that the lock will in this particular case act asa friction lock which will yield under an excessive or emergency pull onthe slide fastener, without .inJuring the fastener. The presentarrangement through 7 of the drawing. As before, the slider is providedwith a top wall 40 and a bottom wall 12 joined at a neck portion 44, andthe lower end v of top wall 40 is provided with a downwardly extendinglug or projection 46, located in the plane of the wall. The pull 8 isbifurcated to form arms 50, each of which carries an inwardly as asimilar pin, if symmetrically located at the other side of the pull,would tend to close on top of an element instead of between elements.This, while entirely feasible with a cam-shaped lock of moderate radius,cannot be done with a real locking tooth or pin of substantial length.

It is believed that the construction and operation of my improved flushpull slider for slide fasteners, as well as the advantages thereof, willbe apparent fromthe foregoing detailed description. The pull is flushwith the slider, and both have a smooth, flat top surface. The pull isno wider than the narrowest part of the slider, and is substantially asnarrow as the interlocked rows of elements. Thus no objectionable bumpswill be caused on a garment using this slider, and no injury to thefabric will result during ironing. The tapes of the fastener may bestitched to the garment reasonably closely to the fastener elements. Theslider may, if desired, be provided with locking means, and variousforms of locking cams and teeth may be employed.

directed trunnion 52 formed integrally the:re-.

with. These arms are preliminarily spread to the diverg Dflsition shownin Fig. 5. The side edges of the lug 46 are indented to form sockets orholes 54 dimensioned to receive the trunnions 52. In practice, the pullmay be added tothe slider by means of a suitable fixture or die whichpositions thespread arms 50 astride the lug ll, then heads the armstoward .one another to the parallel position shown in Fig. 6, thusforcing the trunnions 52 into the bearing holes in lug 46.

The modified slider shown in Figs. 4 through 7 differs in several otherminor respects. One is that the lug 46 in this case is projecteddownwardly from the lower end of the slider, instead of being formed bycuttingaway a part of the top wall of the slider. Thus the workinglength of the flanges of the slider is the same at the top and bottom,whereas in the arrangement It Will be understood that the variantfeatures disclosed in the drawing are interchangeable with one another.Thus, trunnions formed integrally with the pull may be used with therelatively flat cams or friction-lock shown in Fig. 2, and may be usedwith the shortened top wall shown in Fig. 2. Similarly, the positivelocking tooth or pin of 8 may be used with either the shortened top wallof Fig. 2, or the separate pivot pin of Fig. 2, or both. when a cam lockshown in Fig. 2, the flanges at thetop of the slider are shorter thanthose at the bottom, Another difference which will be clear frominspection of Fig. 'I,is that the locking cams 56 are made more acute,thus giving the slider a more positive locking action. As before, thehigh point of the cam is preferably located below the axis,

so as to make the slider self-locking once the pull has been nearlyonwhollyturned down. The choice of cam shape, as between'the' flat camof Fig. .2 and the steeper cam of Fig. 7, depends on whether the slideris to act as a friction lock or as a positive lock.

The flush pull slider of my invention may also be provided with a pinlook. This is shown in Figs. 8 and 9, in which the slider comprisesflanged top and bottom walls 58 and 80 Joined at a neck portion 82. Asbefore, the top wall is flat, and isprovided with a downwardly extendinglug N. --The pull OI is bifurcated to straddle the lug N, and may beprovided with integrally formed trunnion's 08, all as previouslydescribed. One of the arms 0 of the pull is projected beyond thetrunnion I8, and is transversely bent to form a locking toothll. Thislocking tooth is employed, a. single cam may, if desired, be usedinstead of a double cam, although I believe the latter preferable.

With a cam lock, it is preferable to' back up the fastener elements bymeans of the back wall of the slider, as shown in Fig. 3. The back wallmay be extended downwardly without side flanges, if desired. If the backwall is not extended downwardly, as shown in Fig. 7, thenthe cam 56should be given a substantial rise, because the grip against openingwill depend primarily on oifsetting or kinking the stringers at thelower end of the slider. For this kind of locking action, it is alsobetter to provide a nearly square corner at the .point 43 instead of abevelled edge as shown in Figs. 2 and 8.

If the back wall of the slider is not to be extended downwardly, thenthe hooked pin lock shown in Fig. 8 is the most satisfactory, as'it,

tends to lock independentlyof the back wall, assuming, of course, thatthelocking having advantages even for such pin-poses or apelements, andso acts as. typical pin lock. It

should be noted that with the pin type of lock,

plications as do not require the use of a lock. The advantageof having aflush pull and also, the advantage of having a locking slider with aflush pull are, of course, not limited to the par- 'ticular shape anddimension of the pull shown, in which the pull has the same width as thelower end of the slider. When the slider is unconventionally shaped, thepull may-be adapted to the shape of the lower end of such an un-.conventional slider, so as to give the slider a, pleasing appearance.The upper end of the pull may, for this purpose, require a widtheitherwider or narrower than the interlocked fastener elements, instead ofsubstantially equalling the interlocked fastener elements, as hereshown. I It will therefore. be apparent that while I have shown anddescribed my invention in several the pin is provided at only one sideof the pull, 15 preferred forms, many changes andmodinc'ations.

, .pin is ve y Y near the lower end of the slider. I

1. A slider for a slidefastener, said slider comprising top and bottomwalls, and a pull, said pull being disposed in alignment with the lowerend of the top wall of the slider, whereby said slider and pull incombination have a flat top surface, the lower end of the top sliderwall being cut away when viewed in plan, and the upper end of the pullbeing matingly cut away and interfitted with the cut-away lower end ofthe top slider wall when viewed in plan, the interfltted parts beingpivoted together on a transverse axis so as to permit the pull to beturned from its flat position to a transverse workingposition,preparatory to movement of the slider.

2. A slider for a slide fastener, said slider comprising top and bottomwalls having downwardly converging flanges and joined at their upper endby a neck portion, and a pull for operating said slider, said pullhaving a width approximately equalling the width of the lower end of theslider and being disposed in alignment with the lower end of the topwall of the slider, whereby said slider and pull in combination have aflat top surface, the lower end of the top slider wall and the upper endof the pull both being matingly cut away and interfitted when viewed inplan, the lnterfitted parts being pivoted together on a transverse axisso as to permit the pull to be turned from a flat position substantiallyflush with the top of the slider to a transverse working position,preparatory to movement of the slider.

3. A slider for a slide fastener, said slider comprising top and bottomwalls, and a pull, said pull being disposed in alignment with the lowerend of the top wall of the slider, whereby said slider and pull incombination have a relatively fiat top surface, the top slider wallbeing provided with a lug projecting from its lower end in the plane ofthe wall, said lug being substantially narrower than the slider wall,the upper end of the pull being bifurcated to form arms dimensioned tostraddle the aforesaid lug, said arms having trunnions forinedintegrally with and projecting inwardly therefrom, said lug havingbearing holes in the side edges thereof receiving the aforesaidtrunnions, whereby said pull may be turned from a flat positionsubstantially flush with the top of the slider to a transverse workingposition, preparatory to movement of the slider.

4. A slider for a slide fastener, said slider comprising top and bottomwalls having downwardly converging flanges and joined at their upper endby a neck portion, and a pull for operating said slider, said pullhaving a width approximately equalling th'e width of the lower end ofthe slider and being disposed in alignment with the lower end of the topwall of the slider, whereby said slider and pull in combination have a,relatively flat approximately flush top surface, the lower end of thetop slider wall being notched or cut away at the sides to form aprojecting lug, the upper end of the pull being slotted to form armsdimensioned to straddle the aforesaid lug, sa d arms having trunnionsformed integrally with and projecting inwardly therefrom, said lughaving bearing holes in th'e side edges thereof receiving the aforesaidtrunnions, whereby said pull may be turned from a flat positionsubstantially flush with the top of the slider to a transverse workingposition, preparatory to movement of the slider.

5. A locking slider made in accordance with claim 1, in which the upperend of the pull immediately adjacent the transverse pivot is providedwith locking means dimensioned to engage the fastener elements when thepull is in fiat position, but disengaged from the fastener elementswh'en the pull is turned to transverse position.

6. A locking slider made in accordance with claim 1, in which the upperend of the pull is provided with locking means dimensioned to engage thefastener elements when the pull is in flat position, but disengaged fromthe fastener elements when the pull is turned to transverse position,said locking means comprising one or more cam-like projections locatedat the upper end of the pull immediately adjacent the transverse pivot.

7. A locking slider made in accordance with claim 1, in which the upperend of the pull is provided with locking means dimensioned to engage thefastener elements when the pull is in flat position, but disengaged fromthe fastener elements when the pull is turned to transverse position,said locking means comprising a locking tooth or pin located at theupper end of the pull immediately adjacent the transverse pivot.

8. A locking slider made in accordance with claim 3, in which th'e upperend of the pull immediately adjacent the transverse pivot is providedwith locking means to engage the fastener elements of a slide fastenerwhen the pull is in flat position, but disengaged from the fastenerelements when the pull is turned to transverse position.

9. A locking slider made in accordance with claim 3, in which the upperend of the pull immediately adjacent the transverse pivot is providedwith locking means to engage the fastener elements of a slide fastenerwhen the pull is in fiat position, butdisengaged from the fastenerelements when the pull is turned to transverse position, said lockingmeans. comprising one or more cam-like projections formed integrallywith and projecting from the arms of the pull.

10. A locking slider made in accordance with claim 3, in which the upperend of the pull immediately adjacent the transverse pivot is providedwith locking means to engage the fastener elements of a slide fastenerwhen the pull is in ilat position, but disengaged from the fastenerelements when th'e pull is turned to transverse posiprojecting from itslower end in the plane of the wall, said lug being substantiallynarrower than the slider wall, the upper end of the pull beingbifurcated to form arms dimensioned to straddle the aforesaid lug, andmeans pivoting. the arms to the lug, whereby said pull may be turnedfrom a flat position substantially flush with the top of the slider to atransverse working position, preparatory to movement of the slider.

FREDERICK ULRICH.

